Pig organs like the kidney transplanted on March 16 are harvested from cloned animals (which are “treated like kings and queens” and euthanized humanely after living comfortable lives ...

US scientists have developed a simple and inexpensive optical imaging system that provides real-time mapping of animals' internal organs. The new system, which researchers Elizabeth Hillman of ...

Why animals developed four types of skeletons From a Hercules beetle tough natural armor to a sea anemone’s soft fluid-filled body, nature boasts a variety of skeletons.

It may have been one of the first life forms built that way, making it a crucial step towards modern organisms like animals that also have a skin that is distinct from the cells inside the body.